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Peter Anvin" , Thomas Gleixner , linuxppc-dev@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" Excerpts from David Rientjes's message of April 14, 2020 10:27 am: > On Mon, 13 Apr 2020, Nicholas Piggin wrote: >=20 >> We can get a significant win with larger mappings for some of the big >> global hashes. >>=20 >> Since RFC, relevant architectures have added p?d_leaf accessors so no >> real arch changes required, and I changed it not to allocate huge >> mappings for modules and a bunch of other fixes. >>=20 >=20 > Hi Nicholas, >=20 > Any performance numbers to share besides the git diff in the last patch i= n=20 > the series? I'm wondering if anything from mmtests or lkp-tests makes=20 > sense to try? Hey, no I don't have any other tests I've run. Some of the networking hashes do make use of it as well though, and might see a few % in the right kind of workload. There's probably a bunch of other stuff where it could help a little bit, looking through the tree, I just don't have anything specific. Thanks, Nick